LGS Mixed Practice Test #89

Question 1

A drug that structurally resembles the substrate and binds to the active site of an enzyme, preventing the substrate from binding, is an example of what type of inhibition?

Accepted Answer

C. Competitive inhibition — Competitive inhibitors directly compete with the substrate for binding to the enzyme's active site due to their structural similarity. This type of inhibition can often be overcome by increasing the substrate concentration. Non-competitive inhibitors bind to a different site on the enzyme.

Answer

A. Non-competitive inhibition

Answer

B. Uncompetitive inhibition

Answer

D. Irreversible inhibition

Question 2

Lens formula:‌​‍

Accepted Answer

1/v - 1/u = 1/f — Cartesian sign convention. ‌​‍For convex lens f>0; concave f<0. Magnification m = v/u.

Answer

u = v

Answer

u + v = f

Answer

1/u + 1/v = 1/f

Question 3

Marthanda Varma dedicated the Travancore kingdom to Lord Padmanabha (Thripadidanam) in:‌​‍

Accepted Answer

1750 — In 1750, Marthanda Varma dedicated the entire kingdom of Travancore to Lord Padmanabha of the Padmanabhaswamy Temple, and thereafter ruled as 'Padmanabhadasa' (servant of Padmanabha).‌​‍

Answer

1729

Answer

1741

Answer

1758

Question 4

Maslow's hierarchy — top level:‌​‍

Accepted Answer

Self-actualisation — Order: Physiological → Safety → Love/belonging → Esteem → Self-actualisation. ‌​‍Self-transcendence added later.

Answer

Physiological

Answer

Safety

Answer

Esteem

Question 5

Displacement is:‌​‍

Accepted Answer

Vector — shortest straight-line from initial to final — |Displacement| ≤ distance. Zero for closed-loop path while distance ≠ 0.‌​‍

Answer

Same as distance

Answer

Always positive

Answer

Scalar

Question 6

Typical embryo sac is:‌​‍

Accepted Answer

Monosporic, 8-nucleate, 7-celled — Polygonum type. ‌​‍3 antipodal + 2 synergids + 1 egg + 1 central cell (with 2 polar nuclei). Megaspore mother cell → 4 megaspores; 1 survives.

Answer

Bisporic

Answer

Zygotic

Answer

Tetrasporic

Question 7

Attribution theory — fundamental attribution error:‌​‍

Accepted Answer

Overweighting dispositional (personality) factors for others' behavior — Self-serving bias (own successes: dispositional; failures: situational). ‌​‍Lee Ross coined term.

Answer

Overweighting situation

Answer

None

Answer

Equal

Question 8

CIAL's solar power achievement:‌​‍

Accepted Answer

First fully solar-powered airport (2015) — World's first fully solar-powered airport.‌​‍

Answer

No solar

Answer

100% wind

Answer

Partial

Question 9

The National Curriculum Framework for Teacher Education (NCFTE) 2009 strongly advocates for a shift in teacher preparation programs. Which of the following is a key recommendation of NCFTE 2009 regarding the nature of teacher education?

Accepted Answer

B. To prepare teachers for a diverse and inclusive classroom environment. — NCFTE 2009 emphasizes preparing teachers to handle diverse learners and foster inclusive classroom environments, moving beyond a one-size-fits-all approach. Options A, C, and D contradict the spirit of NCFTE 2009, which promotes practical orientation, flexibility, and quality enhancement in teacher education rather than mere theoretical focus, rigid standardization, or reduced duration.

Answer

A. To focus primarily on theoretical knowledge of educational psychology.

Answer

C. To standardize all teacher training content uniformly across the country.

Answer

D. To reduce the duration of teacher training courses to attract more candidates.

Question 10

Reason behind formation of rainbow:‌​‍

Accepted Answer

Dispersion of light — Rainbow is formed by dispersion (and refraction + total internal reflection) of sunlight in water droplets.‌​‍

Answer

Scattering of light

Answer

Interference of light

Answer

Reflection of light

LGS Mixed Practice Test #89